#include<iostream>
using namespace std;

void main(void)
{
	int i = 5;
	int j = 3;
	int k, m, n=1;
	for (m = i - j,k=i; m > 0; m--)
		n = n * k--;
	for (m = i - j; m > 0; m--)
		n = n / m;
	cout << n << endl;
}